Superconductor Ionic Memory for Quantum State Storage
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Solution Overview
Problem
Current memory devices for quantum computation face challenges in achieving high density, low voltage, fast operation, and cryogenic compatibility, with existing technologies like flash, MRAM, and RRAM having limitations in scalability, voltage requirements, and material integration issues.
Innovation Solution
A solid-state cryogenic compatible memory device using a superconductor/barrier/ionic/barrier/superconductor (SBIBS) heterostructure that performs write, read, and erase operations with fast, low-voltage electrical pulses, leveraging strong electric fields and quantum transport processes to achieve reversible ionic separation and storage of quantum states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional memory devices (flash, MRAM, RRAM) are used for quantum computation, then existing technology can be leveraged, but scalability, voltage requirements, and material integration are limited
Solution Approach 1:
The patent employs a heterostructure comprising multiple layers including superconductor layers, barrier layers, and ionic layers. This composite structure integrates materials with different properties to achieve both quantum compatibility and functional memory operations, resolving the material integration challenges of conventional devices
2Quantity of substance
If high density memory is achieved, then storage capacity increases, but operation speed and voltage requirements may deteriorate
Solution Approach 1:
The patent replaces conventional electrical resistance-based switching with ionic displacement mechanisms driven by electric fields. Ions move between ionic layers to switch memory states, enabling high-speed operation at low voltages while maintaining high density through the layered heterostructure configuration
3Use of energy by moving object
If low voltage operation is achieved, then energy consumption decreases, but operation speed may slow down
Solution Approach 1:
The patent utilizes the displacement of ions within the ionic layers as the switching mechanism. By applying low voltage electric fields, ions are displaced to change the resistance state, enabling energy-efficient operation. The ionic displacement process occurs rapidly, maintaining high operation speed despite low voltage requirements
4Speed
If fast operation is achieved, then computation speed increases, but memory stability and non-volatility may deteriorate
Solution Approach 1:
The patent extracts and utilizes ionic layers from conventional memory structures to create a dedicated mechanism for stable state retention. The ions are displaced to specific positions within the ionic layers to establish memory states, and their physical positioning provides inherent stability and non-volatility, preventing spontaneous state changes while allowing rapid switching
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables high-speed, low-voltage operation with improved scalability and non-volatility, allowing for efficient quantum computation and energy-efficient information storage, with potential for long-term storage and reduced need for constant refreshing of quantum states.
Implementation Method 1
The memory effect is based on reversible electric field-induced ionic separation/transport achieved in superconductor/barrier/ionic/barrier/superconductor (SBIBS) heterostructure devices
Implementation Method 2
leveraging strong electric fields and quantum transport processes to achieve reversible ionic separation and storage of quantum states
Data Source
AI summary
A system and method involve generating an electric field across a superconductor device having an ionic layer disposed between and separated from first and second superconductor layers by respective first and second barrier layers. The electric field may be generated by applying an input signal, such as a voltage, to the superconductor device while the device is in a superconducting state. The voltage may be below a threshold voltage for inducing ion transport within the ionic layer or may be above or below a threshold voltage for inducing ion transport from the ionic layer across an ionic layer/barrier layer interface. The ion transport may tune the potential profile and/or modulate the critical current of the superconductor device and may include quantum coherent ionic transport, Josephson tunneling, or resonant tunneling. The electric field generated across the superconductor device may alter the spin-states of the ions within the ionic layer.